The Bad Astronomer writes: "Astronomers have discovered that the source of water in Saturn's upper atmosphere is none other than the geysers erupting from its moon Enceladus. The geysers spew water into space, most of which is lost. A small amount, though, falls to Saturn... equivalent to only about 7.5 kilos/second over the entire planet. A typical rainfall on Earth is 42 trillion times heavier."